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https://www.readbyqxmd.com/read/28806652/applicability-of-alkaline-precipitation-for-the-recovery-of-edds-spent-solution
#1
Marco Race
This paper presents an innovative procedure for the recovery of SS-ethylenediamine-N,N'-disuccinic acid (EDDS) solution used for soil washing processes. The procedure is derived from that applied for the recovery of ethylenediamine-tetraacetic acid (EDTA), modifying and optimizing the choice of the chemical agents used for the protonation of the chelant, the exchange of the metals, and the final precipitation of the unwanted compounds. To select the reagents and test the proposed approach, an experimental study was conducted on real EDDS spent solutions, obtained washing a Cu and Zn real contaminated soil...
August 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28806555/environmental-and-socio-economic-sustainability-appraisal-of-contaminated-land-remediation-strategies-a-case-study-at-a-mega-site-in-china
#2
Yinan Song, Deyi Hou, Junli Zhang, David O'Connor, Guanghe Li, Qingbao Gu, Shupeng Li, Peng Liu
Green and sustainable remediation (GSR) has become a global trend in the contaminated land remediation field. Growing numbers of countries have adopted GSR procedures published in regulatory and/or technical guidance. China is fast becoming one of the largest remediation markets in the world, and is beginning to engage with GSR. Among other efforts, a taskforce is currently developing the first Chinese technical standard on GSR. This paper presents the context positioning and development of a sustainable remediation assessment indicator set for China...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28806349/dual-phase-99mtc-mibi-imaging-and-the-expressions-of-p-gp-gst-%C3%AF-and-mrp1-in-hyperparathyroidism
#3
Jianjun Xue, Yan Liu, Danrong Yang, Yan Yu, Qianqian Geng, Ting Ji, Lulu Yang, Qi Wang, Yuanbo Wang, Xueni Lu, Aimin Yang
OBJECTIVE: The aim of this study was to further elucidate the mechanisms of dual-phase technetium-99m methoxyisobutylisonitrile (Tc-MIBI) parathyroid imaging by exploring the association between early uptake results (EUR), delayed uptake results (DUR), and the retention index (RI) in dual-phase Tc-MIBI parathyroid imaging and P glycoprotein (P-gp), multidrug resistance-associated protein 1 (MRP1), and glutathione S-transferase-π (GST-π) expression in hyperparathyroidism (HPT). PATIENTS AND METHODS: Preoperative dual-phase (early and delayed) Tc-MIBI imaging was performed on 74 patients undergoing parathyroidectomy for HPT...
August 11, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28806071/contrasting-effects-of-dissolved-organic-matter-on-mercury-methylation-by-g-sulfurreducens-pca-and-d-desulfuricans-nd132
#4
Linduo Zhao, Hongmei Chen, Xia Lu, Hui Lin, Geoff A Christensen, Eric M Pierce, Baohua Gu
Natural dissolved organic matter (DOM) affects mercury (Hg) redox reactions and anaerobic microbial Hg methylation in the environment. Several studies have shown that DOM can enhance Hg methylation, especially under sulfidic conditions, whereas others show that DOM inhibits Hg methylation due to strong Hg-DOM complexation. In this study, we investigated and compared the effects of DOM on Hg methylation by an iron-reducing bacterium Geobacter sulfurreducens PCA and a sulfate-reducing bacterium Desulfovibrio desulfuricans ND132 under non-sulfidic conditions...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28805394/high-efficiently-delaminated-single-layered-mxene-nanosheets-with-large-lateral-size
#5
Gengnan Li, Li Tan, Yumeng Zhang, Binghan Wu, Liang Li
Single layered Ti3C2(OH)2 nanosheets have been successfully fabricated by etching its Ti3AlC2 precursor with KOH in the presence of small amount of water. The OH group replaced the Al layer within Ti3AlC2 structure during etching process and Ti3C2(OH)2 nanosheets could be easily and efficiently achieved through a simple washing process. The delaminated single layered nanosheets are clearly revealed by atomic force microscopy to have several micrometers in lateral size. Interestingly, the exfoliated Ti3C2(OH)2 nanosheets could be restacked to form a new layer-structured material during drying process...
August 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28804670/synthesis-and-characterization-of-mixed-iron-manganese-oxide-nanoparticles-and-their-application-for-efficient-nickel-ion-removal-from-aqueous-samples
#6
Alessandro Buccolieri, Antonio Serra, Giuseppe Maruccio, Anna Grazia Monteduro, Sanosh Kunjalukkal Padmanabhan, Antonio Licciulli, Valentina Bonfrate, Luca Salvatore, Daniela Manno, Lucio Calcagnile, Gabriele Giancane
Mixed iron-manganese oxide nanoparticles, synthesized by a simple procedure, were used to remove nickel ion from aqueous solutions. Nanostructures, prepared by using different weight percents of manganese, were characterized by transmission electron microscopy, selected area diffraction, X-ray diffraction, Raman spectroscopy, and vibrating sample magnetometry. Adsorption/desorption isotherm curves demonstrated that manganese inclusions enhance the specific surface area three times and the pores volume ten times...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28803963/model-analysis-of-bidirectional-interference-in-two-stage-labeled-ligand-immunoassays
#7
Eleanor R Lewin, Amitava Dasgupta, Roland Valdes, Douglas F Stickle
OBJECTIVES: Immunoassays involving sample incubation followed by a wash step prior to introduction of labeled analyte are potentially subject to both positive and negative interference (bidirectional interference) by a competing ligand. We examine this phenomenon from a theoretical standpoint using a mathematical model for sequential-step immunoassays in the presence of interferent. DESIGN & METHODS: Competitive binding to antibody between analyte and interferent was modeled for sequential-step immunoassays...
August 10, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28803864/the-detection-of-microorganisms-related-to-urethritis-from-the-oral-cavity-of-male-patients-with-urethritis
#8
Phuong Thi Le, Ryoichi Hamasuna, Masahiro Matsumoto, Keiichi Furubayashi, Masayuki Hatanaka, Shuichi Kawai, Takamasa Yamaguchi, Kazutaka Uehara, Norihiko Murakami, Masaru Yoshioka, Ken Nakayama, Yutaka Shiono, Keisuke Muraoka, Masahiko Suzuki, Naohiro Fujimoto, Tetsuro Matsumoto
OBJECTIVES: To investigate the presence of microorganisms related to urethritis in the oral cavity of male patients with urethritis and the efficacies of antimicrobials for urethritis on microorganisms in the oral cavity. METHODS: Ninety-two male patients with urethritis and 17 male controls participated to this study at 12 urology clinics in Japan between March 2014 and March 2015. The first voided urine (FVU) and oral wash fluid (OWF) specimens were collected from the participants...
August 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28803543/bodipy-based-dye-for-no-wash-live-cell-staining-and-imaging
#9
Alexey A Pakhomov, Igor E Deyev, Natalia M Ratnikova, Stepan P Chumakov, Veronika B Mironiuk, Yuriy N Kononevich, Aziz M Muzafarov, Vladimir I Martynov
In nonpolar solvents, hydrophobic organic fluorophores often show bright fluorescence, whereas in polar media, they usually suffer from aggregation-caused quenching (ACQ). Here, we harnessed this solvatochromic behavior of a 1,3,5,7-tetramethyl-BODIPY derivative for cell staining and applied it to live-cell imaging and flow cytometry. As opposed to commercially available dyes, this BODIPY derivative showed excellent contrast immediately after staining and did not require any wash-off.
August 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28803205/water-footprint-assessment-for-crop-production-based-on-field-measurements-a-case-study-of-irrigated-paddy-rice-in-east-china
#10
Cao Xinchun, Wu Mengyang, Shu Rui, Zhuo La, Chen Dan, Shao Guangcheng, Guo Xiangping, Wang Weiguang, Tang Shuhai
Water footprint (WF) is a comprehensive measure of water consumption by human activities and can be used to assess the impact on both water volume and quality. This study aims to explore the feasibility of evaluating green, blue and grey WFs of crop production based on field measurements. The irrigated paddy rice grown in three different experimental sites in different typical irrigation districts in Huai'an, East China over 2011 to 2014 was taken as study case. With fixed irrigation and fertilization, on the basis of measuring field water and fertilizer balance at daily step, we calculated WF of crop production under different test treatments...
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28803145/plasmix-management-lca-of-six-possible-scenarios
#11
R Cossu, F Garbo, F Girotto, F Simion, A Pivato
Only a small percentage of the separately collected plastic is recycled. The mechanical selection process of source segregated plastic materials generates considerable amounts of residues that are commonly named as Plasmix. By means of a life cycle assessment (LCA) modelling, the environmental performances of the main Plasmix management options (thermal treatment, energy recovery, and landfilling) were compared. Six treatment scenarios, with different pre-treatment alternatives, were evaluated. Landfilling after waste washing and Plasmix substitution of coke in a blast furnace represent the most favorable options, since the performances of thermal treatment and energy recovery are worsened by specific emissions of a variety of toxic compounds and heavy metals within plastic materials as additives...
August 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28803116/efficient-molecularly-imprinted-polymer-as-a-pipette-tip-solid-phase-sorbent-for-determination-of-carvedilol-enantiomers-in-human-urine
#12
Anny Talita Maria da Silva, Hanna Leijoto de Oliveira, Camilla Fonseca Silva, Matheus Cecílio Fonseca, Thales Fernando Dias Pereira, Clebio Soares Nascimento, Eduardo Costa de Figueiredo, Keyller Bastos Borges
In this work, an efficient pipette tip based on molecularly imprinted polymers solid-phase extraction (PT-MIP-SPE) method was developed for carvedilol (CAR) analysis. This compound is available in clinical practice as a racemic mixture, in which (-)-(S)-CAR is a β- and α1-adrenergic antagonist, while (+)-(R)-CAR only acts as an α1-adrenergic antagonist. Enantioseparation of CAR presented satisfactory retention times (5.85 and 14.84min), acceptable theoretical plates (N=2048 and 2018) and good resolution (Rs=9...
August 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28802395/changes-in-pediatric-tracheostomy-tubes-exposed-to-home-dishwashing
#13
David E Smolar, Brian Ho, Steven M Kent, C Anthony Hughes, Donald Mettenburg, Fredrick A Rueggeberg, Michael W Groves
OBJECTIVE: Determine the effects of household dishwashing on Tracheostomy Tube safety. INTRODUCTION: Tracheostomy tubes accumulate biofilms, which may limit their lifespan. Frequent cleaning of the tubes is a method for biofilm prevention. Cleaning practices vary widely. Some families prefer dishwashing of tubes, but its effects are currently unknown. We hypothesize that dishwashing has no significant effect on the physical properties of tracheostomy tubes and can be recommended as a safe way to clean tracheostomy tubes...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28801955/single-layer-centrifugation-of-fresh-dromedary-camel-semen-improves-sperm-quality-and-in-vitro-fertilization-capacity-compared-with-simple-sperm-washing
#14
C Malo, E G Crichton, J M Morrell, B S Pukazhenthi, J A Skidmore
Single layer centrifugation (SLC) through a colloid is a tool for selecting viable mammalian spermatozoa but has not been used previously for fresh dromedary camel sperm. Semen from six camels (2 ejaculates/male) was diluted 1:5 (v:v) or 1:10 (v:v) in a Tris-citrate-fructose buffer for mechanical liquefaction by gentle pipetting. Following liquefaction, semen was processed either by SLC or by centrifugation without a colloid (control). Total and progressive motilities, CASA kinematics, vitality and acrosome integrity (eosin-nigrosin) and plasma membrane integrity (Hypo-osmotic swelling test; HOST), and fertilizing ability in a heterologous assay (zona-free goat oocytes) were evaluated...
August 12, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28801148/assessing-and-addressing-the-problem-of-pain-and-distress-during-wound-care-procedures-in-paediatric-patients-with-burns
#15
Marianne J E van der Heijden, Alette de Jong, Heinz Rode, Roux Martinez, Monique van Dijk
OBJECTIVE: While the prevalence of burns in children is highest in low and middle-income countries, most research on burn-related pain intensity and distress is carried out in high-income countries. In this study we assessed pain intensity and distress in paediatric patients with burns undergoing wound care procedures without distraction and parental presence in a South-African children's hospital and sought to identify predictors for the outcomes. METHODS: This observational study, carried out as part of a randomized controlled trial, took place at a burns unit in Cape Town, South Africa and included patients between the ages of 0 and 13 years undergoing their first or second wound care procedure...
August 8, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28800906/solid-phase-analytical-derivatization-for-gas-chromatography-mass-spectrometry-based-metabolomics
#16
Emi Takeo, Ryoichi Sasano, Shuichi Shimma, Takeshi Bamba, Eiichiro Fukusaki
A novel derivatization method for gas chromatography/mass spectrometry (GC/MS)-based metabolomics was developed, based on solid-phase analytical derivatization (SPAD) with methoximation followed by trimethylsilylation. This SPAD method realized derivatization on solid phases combining strong anion exchange with strong cation exchange. To omit a sample condensation process, GC/MS injection was performed using a large-volume injection mode. This mode uses a stomach-shaped insert, and enables a large quantity of sample to be vaporized and introduced into the GC/MS system...
August 8, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28800826/effect-of-thyme-essential-oil-and-lactococcus-lactis-cbm21-on-the-microbiota-composition-and-quality-of-minimally-processed-lamb-s-lettuce
#17
Lorenzo Siroli, Francesca Patrignani, Diana I Serrazanetti, Pamela Vernocchi, Federica Del Chierico, Alessandra Russo, Sandra Torriani, Lorenza Putignani, Fausto Gardini, Rosalba Lanciotti
The main aim of this work was to evaluate, at pilot scale in an industrial environment, the effects of the biocontrol agent Lactococcus lactis CBM21 and thyme essential oil compared to chlorine, used in the washing step of fresh-cut lamb's lettuce, on the microbiota and its changes in relation to the time of storage. The modification of the microbial population was studied through pyrosequencing in addition to the traditional plate counts. In addition, the volatile molecule and sensory profiles were evaluated during the storage...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28800825/efficacy-evaluation-of-a-new-water-sanitizer-for-increasing-the-shelf-life-of-southern-australian-king-george-whiting-and-tasmanian-atlantic-salmon-fillets
#18
Manouchehr Khazandi, Permal Deo, Sergio Ferro, Henrietta Venter, Hongfei Pi, Simon Crabb, Tony Amorico, Abiodun D Ogunniyi, Darren J Trott
The bacterial species and specific spoilage organisms associated with the Southern Australian King George Whiting (KGW) and Tasmanian Atlantic Salmon (TAS), and the efficacy of a HOCl-containing water-based sanitization product (Electro-Chemically Activated Solution, by ECAS4) in extending the shelf life of KGW and TAS fillets were evaluated. Fillets were washed with an ECAS4 solution containing either 45 ppm or 150 ppm of free chlorine and bacterial species enumerated on selective and non-selective media, followed by identification of pure isolates by 16 S rRNA gene sequencing...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28799674/ultrastructural-characteristics-of-ovine-bone-marrow-derived-mesenchymal-stromal-cells-cultured-with-a-silicon-stabilized-tricalcium-phosphate-bioceramic
#19
Salvatore Desantis, Gianluca Accogli, Janina Burk, Sara Zizza, Maria Mastrodonato, Edda G Francioso, Roberta Rossi, Antonio Crovace, Leonardo Resta
Bioceramics are being used in experimental bone engineering application in association with bone marrow derived mesenchymal stem cells (BM-MSCs) as a new therapeutic tool, but their effects on the ultrastructure of BM-MSCs are yet unknown. In this study we report the morphological features of ovine (o)BM-MSCs cultured with Skelite, a resorbable bioceramic based on silicon stabilized tricalcium phosphate (SiTCP), able to promote the repair of induced bone defect in sheep model. oBM-MSCs were isolated from the iliac crest, cultured until they reached near-confluence and incubated with SiTCP...
August 11, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28799530/scanning-electron-microscopy-study-of-hair-shaft-changes-related-to-hardness-of-water
#20
Lujain M Alahmmed, Ebtehal A Alibrahim, Abdullah F Alkhars, Mohammed N Almulhim, Sayed Ibrahim Ali, Feroze Kaliyadan
INTRODUCTION AND AIMS: Brittleness and breakage of hair is a common complaint in the geographical area of Saudi Arabia where we work. This area has a high level of hardness in normal tap water. We aimed to study and compare structural differences and relative deposition of calcium and magnesium salts on the hair shaft surface using scanning electron microscopy (SEM) between hair shaft samples from normal, healthy volunteers treated with hard and soft water. METHODS: Hair samples obtained from 20 healthy volunteers were divided into two groups...
August 9, 2017: Indian Journal of Dermatology, Venereology and Leprology
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